Pressure fed fuel burning lamp



June 15, 1954 A. e. IMBER PRESSURE FED FUEL BURNING LAMP Filed Dec. 4, 1951 f .T f W ty M 4 A I c M 6 s1 ZvVVMN m m %.\A\Afi\w W Z A Patented June 15, 1954 PRESSURE FED FUEL BURNING LAMP Alfred G. Imber, Greenford, England, assignor to Aladdin Industries Limited, Greenford, England, a British corporation Application December 4, 1951, Serial No. 259,843

1 Claim.

This invention relates to oil burning incandescent lamps of the pressure type and has for its main object to provide an improved construction or arrangement designed to overcome certain disadvantages hitherto experienced in the manufacture and use of such lamps.

Pressure lamps as previously constructed have frequently employed an inverted incandescent mantle involving an arrangement wherein a mantle support or air and fuel supply tubes or both extend upwards from the base portion of the lamp structure and partially obscure the light from the mantle. In addition, a preheating device has hitherto formed an auxiliary feature and in some instances this device has also occupied a position in which it obscures the light emitted. By means of the present invention these disadvantages are avoided and a pressure lamp provided in which the construction of the burner parts is simplified; and an auxiliary preheating and igniting device is rendered unnecessary; the light from the mantle is unobstructed; and the burner can be ignited and the lamp brought to full running condition in a very short space of time.

According to the invention a pressure lamp of the kind referred to is characterised in that a vaporising tube extending between a reservoir and a burner jet is arranged with part of its length lying within the confines of the mantle for the purpose of vaporising the fuel before it reaches the jet disposed in a position below the lower edge of the mantle.

According to one form of the invention a pressure lamp of the kind referred to is characterised by a vaporiser in the form of an inverted U shaped tube lying within the-confines of the mantle, one arm of the said tube being mounted upon and communicating with the reservoir and the other arm of said tube communicating with a burner jet disposed in a position below the lower edge of the mantle.

According to another form of the invention a pressure lamp comprises a liquid fuel reservoir, a control valve mounted on said reservoir, a fuel supply tube mounted upon the outlet of said control valve, a burner head mounted upon the upper part of said tube, a vaporiser connected to the upper end of said supply tube and disposed within the confines of the mantle, and a tubular connection passing through said burner head from the vaporiser to a burner jet device disposed centrally beneath the open lower end of the burner head.

Reference will now be made to the accompanying drawings wherein:

Fig. 1 is an elevation, partly in section of a pressure lamp constructed according to the invention but with the lamp glass and top cover omitted for clearness,

Fig. 2 is a sectional elevation, to an enlarged scale of the burner jet, burner and pre-heater.

Fig. 3 is a sectional plan taken on the line A-B of Fig. 1, and

Fig. 4 is a sectional plan taken on the line 0-1) of Fig. 1.

In the construction illustrated and referring first to Fig. 1, the pressure lamp includes a reservoir I provided with a pump 2 for raising the pressure within the reservoir in known manner. Mounted upon the reservoir is a valve housing 3 having a hand adjusting member 4 projecting from it to enable the valve to be moved to any one of three positions. In one position a mixture of air and fuel is supplied to the burner; in another position fuel only is supplied to the burner; and in a third position the reservoir is shut oif. From the valve housing 3 a vaporiser tube 5 extends upwardly in a vertical direction to a point where the tube is formed into a U-shaped bend 6 from where it is continued downwards at 1 and connected to the casing B of a burner jet situated centrally of and supported from a bracket 9 fixed to the vaporiser tube 5, the said jet being also disposed in vertical alignment with the centre of the U-shaped bend 6 in the vapor iser tube. The bracket 9 is conveniently formed as a tray to collect any surplus liquid fuel that may pass through the jet during the preliminary stages of lighting the lamp.

At a level below the said U-shaped bend the two parallel portions 5 and l of the vaporiser tube pass through apertures in a metal disc l0 which is fixed to the said tubes, this disc serving to support a burner head II. This burner head comprises an annular casing open on its inner side at l2 and having a ring of perforations l3 (Fig. 3) in its upper surface, the inner edge of said upper surface seating in a groove formed around the edge of the said disc. The lower surface of the annular casing is formed integral with a sleeve M which depends around the vaporiser tubes and terminates a short distance above the jet. The base of an upright mantle l 5 is secured in an annular groove 16 around the exterior of the burner head. Communication between the reservoir and the vaporiser tube 5-5-7 and burner jet 2| is controlled by means of the hand operated valve device 4.

The interior of the burner jet casing 3 is shown in Fig. 2. Mounted centrally within the casing is a cleaning needle I1 adapted to be pushed through the burner jet orifice M. This needle is movably mounted in a sleeve I8 fixed into and depending from the bracket 9 and terminating at its lower end in a gland l9 through which the lower end of the needle I! extends and is connected to a disc 20 (Figs. 2 and 4) slidably mounted upon the lower part of the vaporiser tube 5. By reciprocating this disc by hand the needle :1 is moved into and out of the burner jet orifice 2|.

The operation of the pressure lamp above described is as follows:

The control valve is first moved to a position in which a mixture of fuel and air can ascend from the reservoir through the vaporiser tube -S-l and a flame is applied to the jet 2 l. The mixture of air under pressure with the liquid fuel causes an immediate flow through the vaporiser tube 56-'! as soon as the valve is opened and the compressed air causes sufficient atomisation of the fuel to enable a flame to be kindled at the burner jet. This condition is maintained for a short period until the flame has heated the vaporiser tube to an extent sufilcient to vaporise the liquid fuel when the position of the control valve is altered to admit fuel only from the reservoir to the vaporiser tube. Operation thereafter continues by the flow of vaporised fuel from the jet inducing air through the sleeve $4 of the burner head, the mixture being deflected outwards by the disc H3 acting as a baffle to pass through the annular opening l2 and upwards through the ring of perforations l3 to burn within the mantle l5.

By means of the arrangements above described, the mantle supporting means at 16 and the burner jet 2i are situated wholly below the mantle whose light is therefore unobstructed while the form and disposition of the vaporiser tube 5-6-'i in conjunction with the absence of an auxiliary preheating device greatly simplifies the lamp both in manufacture and in use as a flame can be applied directly to the burner jet and the lamp brought into its running condition in a very short space of time.

A vaporiser and burner constructed as above described can also be used for heating purposes by omitting the mantle from the assembly.

What I claim is:

A hydrocarbon burning pressure lantern comprising a fuel reservoir, a valve mounted on said reservoir, a fuel supply tube, a burner head mounted above said reservoir including means adapted to support an incandescent mantle, a fuel nozzle and a nozzle cleaning device; said fuel supply tube extending upwardly from said valve through said burner head into heating proximity of the mantle and defining a U-shaped portion with a tube portion constituting a continuous vaporizer extending downwardly to said fuel nozzle, and said fuel nozzle, said cleaning device, said tube portion and said burner head extending in parallel axial alignment with said fuel supply tube in a manner constituting said fuel supply tube the sole support therefor, and said cleaning device being supported on said fuel supply tube by a bracket defining a tray and including a needle and a disc at the end of said needle having sliding engagement with and being guided by said tube for reciprocating movement parallel to said tube.

References Gited in the file of this patent UNITED STATES PATENTS 7 Date 

